15 Multiple Choice 3 points Question at position 15 Urine testing is, by far, the most common method used in drug courts and probation programs. Why is this? This is the case, in part, because urine is typically available in copious amounts, is relatively simple to collect, is inexpensive to analyze, and can be examined for many substances. Participants prefer giving urine to blood despite the process being more embarrassing. Hair and saliva testing is too expensive. Urine has the longest "look back" period for a variety of substances